to daub, to thrust
搠 centers on applying something with a pressing or pushing motion: daubing a substance onto a surface, or thrusting something forward with force.
搠 combines 扌 (hand) with 朔, which likely contributes the sound サク. The character expresses actions done by hand such as thrusting or daubing.
The hand radical 扌 beside 朔 suggests a hand pushing or smearing something. Imagine a hand thrusting a brush forward to daub paint.
For サク, imagine thrusting a sack of paint onto a wall: sack -> サク, and the hand daubs the paint with a thrusting motion.